Nice WWI RPPC post card of a U.S. Army Officer on horse back. An "AZO" post card. Written on the back states:
"Purchased from estate of Hal Erdman
served with Co. "B" 112th Engineers OHIO
37th Div.
A.E.F."

You can see his Engineers castle pin insignia on his collar on the enlarged photos. Horse is stunning as well. Nice addition to the collection.....